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US 11,938,256 B2Granted
Blood component collection cassette having flow control features for pressure sensing
AssigneeTerumo Kabushiki Kaisha
InventorMasatsugu Igarashi
Life of this patent
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Abstract
Provided is a blood component collection cassette capable of measuring a circuit internal pressure using a simple and economical configuration. A blood component collection cassette includes an inflow line for sending blood or a blood component collected from a donor to a centrifugal separator, a return line for returning a predetermined blood component to the donor, and a line forming member forming one of the inflow line and the return line and having a load detection soft portion made of a soft material.
Claims20
A blood component collection cassette for use with a blood component separation device, the blood component collection cassette comprising:
- a cassette body having a sheet shape made of a soft material and including:
- a first flow path formed in the soft material for sending whole blood collected from a donor to the blood component separation device;
- a second flow path formed in the soft material for returning a predetermined blood component to the donor, wherein the first flow path and the second flow path are separate flow paths over a first section of the cassette body, wherein the first flow path and the second flow path overlap with one another in at least one second section of the cassette body, wherein the first flow path comprises a load detection soft portion located in the first section and made of the soft material for detecting internal pressure of the blood component collection cassette;
- a filter disposed in the second flow path, wherein the first flow path in the first section bypasses the filter,
- wherein the at least one second section of the cassette body, in which the first and second flow paths overlap, includes a first overlap part adjacent to a first edge of the cassette body and a second overlap part adjacent to a second edge of the cassette body opposite the first edge, and
- wherein the first section of the cassette body, in which the first and second flow paths are separate, extends between the first overlap part and the second overlap part;
- a first port member provided at the first edge of the cassette body and in fluid communication with the first overlap part, wherein the whole blood from the donor enters the cassette body through the first port member, and wherein the predetermined blood component exits the cassette body through the first port member;
- and
- a second port member provided at the second edge of the cassette body and in fluid communication with the second overlap part, wherein the whole blood from the donor exits the cassette body through the second port member, and wherein the predetermined blood component enters the cassette body through the second port member,
- wherein, in a plan view, the first overlap part is between the first port member and the filter along a first direction that extends from the first edge to the second edge of the cassette body, and
- wherein, in the plan view, the second overlap part is between the second port member and the filter along the first direction.
8 more elements
A blood component collection cassette for use with a blood component separation device having a first load detector, the blood component collection cassette comprising:
- a cassette body having a sheet shape made of a soft material;
- a plurality of fluid passages provided in the cassette body, the plurality of fluid passages including:
- a first fluid passage formed in the soft material for sending whole blood collected from a donor to the blood component separation device;
- and
- a second fluid passage formed in the soft material for returning a predetermined blood component to the donor, wherein the first fluid passage and the second fluid passage are separate from one another over a first section of the cassette body, wherein the first fluid passage and the second fluid passage overlap with one another in a first overlap section and a second overlap section of the cassette body, and wherein the first section of the cassette body includes a first part of the first fluid passage having a first pressure-receiving portion that is pressed by the first load detector to detect internal pressure of the blood component collection cassette in an attached state in which the blood component collection cassette is attached to the blood component separation device;
- a first branch portion adjacent to a first edge of the cassette body and that splits the first overlap section into the first fluid passage and the second fluid passage;
- a second branch portion adjacent to a second edge of the cassette body and that splits the second overlap section into the first fluid passage and the second fluid passage, wherein the first edge of the cassette body is opposite the second edge of the cassette body;
- a third branch portion provided in the first fluid passage in the first section of the cassette body and that splits the first section of the cassette body into the first part of the first fluid passage and a second part of the first fluid passage;
- a first port member disposed at the first edge of the cassette body and through which the whole blood from the donor enters the cassette body and the predetermined blood component exits the cassette body;
- a second port member disposed at the second edge of the cassette body and through which the whole blood exits the cassette body and the predetermined blood component enters the cassette body;
- and
- a filter disposed in the second fluid passage, wherein the first and second parts of the first fluid passage bypass the filter,
- wherein the first part of the first fluid passage is connected between the first branch portion and the second branch portion, and
- wherein the second part of the first fluid passage is connected to the third branch portion and terminates in the cassette body.
11 more elements
Dependencies are inferred from the claim text.